Feed-water heater.



K. BAUMANN FEED WATER HEATER.

APPLICATION LED MAY I, 1915 I 1 ,59 .PatentedAugxBY,1918.

2 SHEETS SHEET INVENTOR.

HIS ATTORNEY IN FACT BA'UIVIANN.

EEED WATER HEATER.

APPLICATION FILED MAY I. 1916- Patentmi Aug. 27 HHS.-

2 SHEETS-SHEET Z INVENTOR.

/ HIS ATTORNEY IN FACT KARL BAUIVIANN, OF URMSTQN, ENGLAND, ASSIGNOR. T0 THE BRITISH WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY, LIMITED, OF LONDON, ENG-LAND.

FEED-WATER HEATER.

Specification of Letters Patent.

Patented Aug. 2?. 1918.

Application filed May 1,1916. Serial No. 94,792.

This invention relates to feed water heat.

ers of the jet or contact type, that is of the type in which heat is comnumicated to the feed water by direct contact with the heating steam. More particularly the invention has for its object to provide an improved or multi-stage feed water heater of the above type. which is adapted to utilize low pressure heating steam at different pressures obtained for example from two or more pointsin a low pressure sta e of a steam turbine or from a low pressure stage and from the packing glands of a turbine.

The improved jet type feed water heater of this invention comprises a plurality of heaters connected by semi-barometric legs, the water from the first heater discharging at an increased pressure into a second haiter. and from there being discharged to the hot well and recorder tank by a pump hereinafter referred to as the lift pump. Where more than two heaters are used the water from the second heater passes at a still further increased pressure to the next succeeding heater and so on until it reaches the final heater from' which it is removed by the lift pump. Alternatively the water from the final heater of the series may be discharged through a barometric leg into a seal well and removed therefrom by a lift pump.

Several ways in which the invention may be carried out in practice are illustrated diagrammatically by way of example in the accompanying drawings, in which Figure 1 represents a two-stage heater constructed in accordance with the invention, and Figs. 2 and 3 are fragmentary views illustrating modifications in the arrangement shown in Fig. 1. Fig. 4 shows a three-stage heater of a somewhat different construction from that represented in l igs. 1. to 3. I

Referring now to Fig. 1, the first heater is indicated at 5 and the second heater at 6, the two heaters being connected by a short. or semi-barometric leg 7 through which. the feed water passes from the first tion into the second heater 6.

to the second heater. Heating steam from the source of lower pressure is admitted through the inlet 8 to the heater 5 and from the source of higher pressure through the inlet 9 to the heater (3.. The condenser discharge pump is shown at 10 and supplies water to the heater through the pipe 11. The heated water is withdrawn from the s cond heater (3 by a lift pump 12 which delivers through the pipe 13 to the hct well, recorder tanks, or elsewhere as may be r quired. A float operated valve 14 is preferably provided in the water supply pipe 11 for the purpose of controlling the supply of water to the heater 5. The object and operation of such a float operated valve is fully set forth in my concurrent application No. 7335, filed 15th May 1915.

The steam supplied to the heaters through the inlets 8 and i) usually contains air which, together with any other air or incondensable gases finding their way into the heater, mustbe extracted therefrom and, for this purpose, as shown in Fig. 1, the first heater 5 is connected at 15 by a pipe or passage with the main condenser. The second heater 6 may also be similarly connected with the main condenser but I prefer to connect the steam space of the second heater (3 with the steam space of the first heater 5 through a pipe 16. An automatic relief valve 18 is inserted in the connecting pipe 16', which valve is adjusted to main tain the pressure in the second heater 6 above that in the first heater 5 by the desired amountand. at the same time, prevent undue leakage of steam from the second heater 6 into the first heater while permitting any excess of steam in the second heater 6 to pass to the first heater 5...

The lower end of the semibarometric leg 7 within the second heater is provided with an upward extension or bend 19 through which the water flows in an upward direc- Said upward extension or bend 19 acts to prevent steam or air from the second heater 6 esthem, having in mind the difference in pressure which should normally exist between the heaters 5 and 6. a

The employment of the relief valve 18 in iii:

the cennection i6 bee-ween the two "heeteze enables the valve M in'the Water supply pipe to the heater to be centroiied by a single float 20. This fleet may be either in, the first or the second heater, or a fleet chamber connected therewith, as may be found meet convenient although it is prefee able is? have the float in ihe second hea ier shown in Fig. l. 1

The automatic relief veive 18 be eceuated by e float in one Or meother of the heaters 01' in e fleet chamber eenneeted eherewieh. If the floateenti'eiiing eke veive 1.4 in the water supply pipeii is in the first heecer 5 then the fleet eenereiiing" the relief valve 18 musi; be in the second heater and must act i0 eiese file relief when the weeer level in the second heater rises shown as being controlled by e fleet, 21 10-- (rated in e float chamber cemmlmicaeing with the first heater .5 in such s manner that the relief Valve 18 will be opened when the Water level in the first heeii-er 5 rises. With this awningemen the vel ein't-he wafer supply pipe 11. ef the heater is conizrciie by a float in the eeeemi 6 es iiiustreted in In some cases, instee-ci cf fiepeniiing soieiy upon she automatic i'eiief valve 18 for permitting the diecheege air frem the second heater inte ijhe firsi; heater 5 or mm the condenser; ev Key-pass 22 around "ii-he veive i8 the pr 16 connecting two veive'i'e is preferably previried fe ad ueing the size of said lay-pass In addition to or in piece of the ielief valve 18 in the eermection 16 beewee i We heaters I sometimes gzezevide e siphen izube 24%. containing sealing We meted in 3. I sure in the second heater rising above predetermined ciegree the sealing Water in the siphon tube 2e will be blown cut and She excess steam in the second of the heaeee wili escape 'thei'ethrough to the first beaten Veiees 25, 26 may be pi'evided in the siphon tube 24: for enabling the same m refiileei with waier while @110 neat is in eperetien. Where the relief \elve is re pieced. by the siphon tube 24 an zic iciitieimi by-pess in the farm 0i a second pipe.

intei'coimeeting the two heaters is provided,

said pipe preferably having as described with referepce to v 0 5 -11 shows an alternative COHSUKRUOI'E fare heater adapted to etiiize steam rem In Fig 2 the reiief valve 18 I yreviie in aciditien I 'E and simmer and 28, 30 the beremea'ic 1e may have an an .i'eme'vmi direcciy in. F 1g. 1'.

:1. hit eump, es ehewn Although heaters heving' mi twe ex" th -mgee have been herein deeceibeci and illustmteei ii: 15 in be undezeeeed 11m;

heaters may be 'consiructei having more than three stages Witheut deg mrting from 'iahe scope if the im'entien.

fiaving new g -wbicsieriy eieeevibeii eiui rteineci nature 0:? my sei. Ewentice i manner the is tube used,

end in declare that What I claim is? l. A muiiii stege feed heavier (.13? the jam er contact type edepteei eentiiiee lee" pressure steam eempr'ising a phueiiiqy of limiter chambers, a, sizeem cennectie-n be each cimmber, semi-baromeisrie legs said. chambers in such manner time see Waite passes 'chrough the same in eeiiies, means for removing water from eke ieeb chamber 0f the series, euiometieeiiy ceeez'clieci means fer v one ehember the chamber new, iewer preeeuee.

.ii multistage heeter aimed 550 ut'iize 10w preesfire e' e fere nt pieeeures, sump: uiuraiiey e1 heater singers Chmugh w, wet-e1" 30 heated passee in series, :reeaiis die-fiversteam ta each stage, means for removnig Wei-er from we stag e, enii means 1'01 automatically w the fine ge to A. mu 3- *ei Water heater adept e0 eiviiize low pressure seeem at iii fei'en; pressures, cemprising a pi'erality 0f heeige: sea-gee through which the :e be 1 passes 11' series, meme fer de- Water heater adept different pressures, threugil which the pass in SG-EiBS, 21

ed. to

ccmpm sen'li-betremeiviic leg; between. said sizeges and pre U u Wardly turned exthrough. which in entering the valved passage connectepeees of stages. eye feed waeer heater 001m 5 at ,!e c ijfl'O through which watez' 0 be heeuec passes in series and. t-idapiied to receive heating fluid at a different pro. a pipe er passage connect-- ing said 3., and an 'mltmmiiic relief valve 30 ete wid pipe of passage. 6', A EDI water beet-e comeenneeem prising at least two stages through which In testimony whereof I have hereunto water to be heated passes in series and subscribed my name this third day c-f adapted to receive heating fluid at a dif- April, 1916.

fei-ent pressure, a pipe or passage connect- KARL BAUMAiTJR 5 ing said stages, an automatic relief valve 10- Witnesses:

cated Within said pipe 01'- passage, and a by- ROBT. 1V. BLQQMER,

pass passage around said relief valve. 7 J. D. WALKER, 

